I had four vodka drinks last night and then got Alcoholzheimer's Disease. I don't remember driving home, or stopping at Del Taco before getting home, or eating them when I got home - hey, was that guy I was talking to last night any cute?

Periodic dementia brought on by excessive alcohol consumption in social environments.

You talk to somebody at a party at length about life, the universe, and everything. Weeks later you see the same person again in "normal" life, you can't remember a thing you said or talked about, or even if you've ever met at all. The only lingering sensation is one of embarrassment from the possibility that you mispronounced the word "lambatse" multiple times. This is a symptom of Alcoholzheimer's Disease. See a doctor.